Method of and means for preparing parisons



March 24; 1936. J. K. E. DIFFENDERFFER 2,035,053

METHOD OF AND MEANS FOR PREPARING PARISONS Filed Nov. 24, 1933 4 Sheets-Sheet l March 1936. J, K; E. DIFFENDERFFER 3 METHOD OF AND MEANS FOR PREPARING PARISONS Filed Nov. 24, 1935 4 Sheets-Sheet 2 25 P 2 2 2i f 7 21 23 10 v v 211 10 R 17 g .17

I I I 19 g 5 E; 1 YV 0 20,16 E k 16 Z .z E T 22 March 24, i936.

METHOD OF AND MEANS FOR PREPARING PARISONS Filed Nov. 24, 1933 4 Sheets-Sheet 3 J. K. E. DIFFENDERFFER 35,053

March 24, 1936. J, E, DIFFENDERFFER 2,035,053 I METHOD OF AND MEANS FOR PREPARING PARISONS Filed Nov. 24, 1933 4 Sheets-Sheet 4 Patented Mar. 24, 1936 UITED STATES PATENT QFIC METHOD OF AND MEANS FOR PREPARING PARISONS 8 Claims.

This invention relates to the art of manufacturing glass bottles and the like and is more particularly an improvement in the method of shaping glass parisons and to a mechanism whereby the shaping can be effected automatically.

In the art of making bottles with a gob feed machine the gob is of an elongated substantially cylindrical shape and the blank mold should be as near the same shape as possible because of diiiiculties in properly filling or loading an angular blank. While a cylindrical blank is correct for use in the production of round or nearly round bottles, it has been found that when these cylindrical blanks are expanded in a blow mold to form a bottle which is angular in shape, a poor distribution of the glass takes place with the result that the walls become thin at the corners or ends of the bottle and the bottle produced is not of sufficient strength to meet the requirements. This poor distribution of the glass also prevents proper annealing of the bottle because different strains are set up during the cooling operation where the glass is of different thicknesses and this is a difficulty which is almost impossible to correct.

The present invention is designed to partially re-shape a blank while it is being transferred to the blow mold, the re-shaping being such as to bring the parison more nearly to the shape of the blow mold than would be the case otherwise.

It is also an object to re-shape the blank while being transferred and without retarding the operation of the machine so that the capacity of the machine will not be reduced.

Another object is to so shape the parison during the transfer operation that after it has been placed in a blow mold designed to produce a bottle which is square, oblong, or of other angular configuration, the said parison when blown, will produce a bottle or the like the walls of which will be of substantially uniform thickness and strength and can be annealed in a satisfactory manner.

With the foregoing and other objects in view which will appear as the description proceeds, the invention consists of certain novel details of construction and combinations of parts and in certain steps of the method hereinafter more fully described and pointed out in the claims, it being understood that changes may be made in the construction and arrangement of parts and in the disclosed method without departing from the spirit of the invention as claimed.

It is to be understood that the present improvements can be used in connection with any type of bottle machine or the like wherein a parison is transferred from a blank mold to a blow mold. This transfer may be made by lifting the parison from the blank-mold and carrying it upwardly in an arc to a blow mold or the parison could be transferred in a right line direction or horizontally in a circular motion. In other words the present improvements are not restricted to any particular type of machine but can be employed wherever a transfer of the parison is made.

In the accompanying drawings a portion of one type of bottle machine has been illustrated.

In said drawings:

Figure 1 is a plan view of a blank mold, a blow mold, and a vertically swinging transfer mechanism with which is combined the structural arrangement forming a part of the present invention, the said mechanism being illustrated in an intermediate position and showing a parison being shaped.

Figure 2 is a front elevation of the structure illustrated in Figure 1.

Figure 3 is a side elevation.

Figure 4 is a section on line 44, Figure 1.

Figure 5 is a plan view on a reduced scale showing the transfer and shaping mechanism in their initial positions.

Figure 6 is a similar view showing the position of these parts during the transfer of the parison and immediately prior to the shaping of the parison.

Figure 7 is a view similar to Figures 5 and 6 showing the positions of the parts after the parison has been shaped as shown in Figures 1 and 2 but prior to being deposited in the blow mold.

Figure 8 is a view similar to Figure 7 showing the positions of the parts after the parison has been deposited in the blow mold.

Figure 9 is an enlarged side elevation of one of the cams forming a part of the shaping mechanism.

Figure 10 is an elevation of the inner member of the lost motion connection between the shaping mechanism and its operating shaft, said shaft being shown in section and the spring forming a Figure 14 is a horizontal section through the blow mold and showing the shaped parison positioned therein prior to the final blowing operation.

In illustrating the mechanism of the glass blowing machine only essential parts have been shown. These include a blank mold I, a blow mold 2 and any mechanism necessary to open and close these molds at the proper times. As this mechanism does not constitute any part of the present invention it has not been deemed necessary to show or describe it.

A bearing structure 3 is mounted on the machine between the two molds and journalled in this structure is a shaft 4 which is adapted to be rotated back and forth by any suitable means in properly timed relation to the opening and closing of the molds. For example a gear 5 can be secured to this shaft and can be rotated by a rack 6 mounted for up and down movement.

Extending from the shaft 4 is a transfer member I having the usual neck ring 8 for engaging the neck portion of a. formed blank and transferring the parison from the blank mold after it has been opened to the blow mold. This transfer mechanism can be of any of the well-known construction capable of opening and closing and as it constitutes in itself no part of the present invention it has not been shown or described in detail.

Secured to each side of the bearing structure 3 is a plate 9 through which the terminals of shaft 4 extend and each of these plates is provided on its outer side face with an arcuate cam I0. Secured to each terminal of shaft 4 is a disk II which, as shown in Figure 10, has a semi-circular groove I2 in one face concentric with the shaft and providing abutments I3 at the ends of the groove. Blocks I4 are slidably mounted in the groove and are held normally pressed against the abutments I3 by an arcuate coiled spring I5 which is seated in groove I2 and thrusts against the blocks.

Mounted to rotate on end portions of shaft 4 are disks I6 each of which has an arcuate groove I! in its inner side corresponding with groove I2 and normally registering therewith. Both grooves I2 and I! are substantially semi-circular in transverse contour and as the blocks I4 and spring I5 are circular in transverse contour they will be movably seated in both grooves, as will be apparent by referring to Figure 4.

Extending from each of the disks I6 is an arm I8 and a bracket I9 is extended outwardly from each of these disks. Each bracket has a transverse bearing pin 20 on which is journalled a lever 2| the lower arm of which is normally spaced from arm I8 by a spring 22. A roller 23 is carried by the upper arm of.lever 2i and is adapted to ride along cam I0.

Pivotally connected to the upper end of lever 2| is an arm 24 the outer end of which is joined to bracket I9 by a link 25. Thus a parallelogram is produced which maintains arm 24 at the same their connections with the yokes 28, as will be obvious.

The arm I8 extends between and cooperates with adjustable stops 32 carried by the respective plates 9. Thus the roller 23 is maintained in contact with the cam I0 at all times.

In operation back and forth rotation is. imparted to shaft 4 in timed relation to the opening and closing of blank mold I and blow mold 2. Normally the transfer mechanism is in an upstanding position as shown by full lines in Figures 1 to 4 inclusive and at this time the presser heads 3| are thrust toward each other by the action of springs 22 which force the rollers 23 into the recessed intermediate portions of cams I0. While the parts are thus located the grooves I2 and I 1 are in accurate register with the blocks I4 in contact with the respective ends of both grooves.

When shaft 4 is rotated in one direction to move the transfer mechanism toward the blank mold, the blocks I4 will act as keys for transferring motion from disks II to disks I6 so that levers 2| and arms 24 will thus be shifted relative to plates '9 and rollers 23 will be caused to ride out of the central recessed portions of cams Ill. Thus heads 3| will be moved apart under the action .of the cams. Heads 3| will move with the transfer structure I until arms I8 come into contact with those stops 32 in the paths thereof. At that time further rotation of disks I6 will be stopped but disks II will continue to rotate with shaft 4 and each will thrust against one of the blocks I4 and compress its spring I5 against the other block I4 which, during this operation, will be held back by the end wall of Compression of springs the groove H in disk I6. I5 will continue until the transfer mechanism arrives with the neck ring under the blank mold. With the parts thus located as shown for example in Figure 5 and by broken lines at the right of Figure 3, the gob is deposited in the blank mold and subjected to its initial shaping in the usual way. Thereafter, at the proper time, the blank mold is opened and shaft 4 is actuated to move the transfer mechanism away from the blank mold, carrying the parison P with it. During the first part of this movement of the transfer mechanism the disks II will rotate independently of disks I6 while the springs I5 are assuming their normal positions in the two grooves I2 and I. As soon as such positions are assumed the advancing blocks I4 in the two disks II will come against the adjacent end walls of grooves I! and exert a thrust against disks It so as to cause them to rotate with disks II. Consequently disks I6 and the parison shaping mechanism carried thereby will be moved with and at the same speed as the transfer mechanism through a short arc determined by the distance between the stops 32. During this joint movement of the transfer and shaping mechanisms the rollers 23 will travel along their respective cams I0 and enter the intermediate recessed portions of the cams so that springs 22 will momentarily force the presser heads 3| toward each other and against the parison. Consequently the parison which initially had been cylindrical or nearly so as shown in Figure 12 will be flattened out by the presser heads as illustrated in Figure 13.

Immediately following the flattening operation described, the arms I8 will come against the other stops 32 which are in the paths thereof. This will not take place however until after the rollers 23 have moved out of the recessed portions of the cams and caused the presser heads 3| to move apart out of contact with the flattened parison.

When the rotation of disks I6 is stopped following the foregoing operation the disks II will continue to rotate with shaft 4, causing those blocks M in one end of each groove I2 to compress the springs I against the other blocks M which are held back by the adjacent ends of the restrained disks [6. This movement of the disks II and the transfer structure 1 independently of the shaping structure will continue until the neck ring 8 is brought to position upon the blow mold 2 which at that time will close about the flattened parison P as shown in Figure 14. The final operation then takes place and as the parison has been flattened out so as to conform nearly to the configuration of the cavity in the blow mold, the resultant bottle will be of substantially uniform strength because of the equal distribution of glass throughout the walls thereof.

Following the formation of the bottle the transfer mechanism moves back toward the blank mold and the operation just described is then repeated.

Importance is attached to the fact that the parison shaping mechanism moves with the transfer mechanism and that the shaping operation occurs during this movement. Thus there is no delay in the operation of the machine and capacity will not be reduced. Furthermore as the parts move in unison there will be no drag set up upon the parison but a direct inward pressure will be produced and the texture of the glass Will not be marred.

What is claimed is:

1. The method of forming angular bottles or the like which includes the step of pressing the sides of the unconfined suspended parison toward each other, while being transferred from a blank mold to a blow mold without retarding the movement of the parison.

2. The method of forming angular bottles or the like which includes the steps of forming a round blank, transferring the parison with a single movement to an angular blow mold, and momentarily compressing the sides of the parison during such movement.

3. The method of forming an angular bottle 5. In a glass bottle machine a blank mold, a

blow mold, a structure movable to transfer a parison, a parison shaping mechanism, means for automatically picking up the shaping mechanism for travel with the transfer structure during a portion of the movement thereof and means controlled by the movement of said mechanism for momentarily compressing the sides of the parison while being transferred.

6. In a glass bottle machine a blank mold, a blow mold, a structure movable to transfer a parison, parison pressing members at opposite sides of the path of said structure, means for carrying the members with the structure during a portion of the movement thereof, and means for automatically shifting the members toward and from each other during said movement thereby to flatten a parison therebetween while being transferred.

'7. In a glass bottle machine a blank mold, a blow mold, a structure working therebetween and movable to transfer a parison, a parison shaping mechanism, a lost motion connection between the transfer structure and the shaping mechanism for producing a joint movement thereof during an intermediate portion of the movement of the transfer structure, and means for actuating the shaping mechanism during said joint movement to flatten the parsion while being transferred.

8. In a glass bottle machine a blank mold, a blow mold, means for transferring a parison with a single movement from the blank mold to the blow mold, and means movable with the transfer means during a portion of its movement for pressing the sides of the parison toward each other.

JOHN K. E. DIFFENDERFFER. 

